Double/ look a like/worth vs counts doubr

Which would one say and is this sentence ok?

1 There is a show that brings both doubles and real artist and the crowd has to distinguish the real from the double/look a like.
2 Which double looks most like the real person? that is if he or she isn't the real person./Which double looks more similar to the real one?
3 You look more similar to the real one than her.

Can you say?

1 You're vote is worth double./counts double.

Thanks